Crystal structure and magnetic properties of the DyCuxGa4-x-δ compounds with BaAl4-type derivatives

被引：0

作者：

Belyavina, N. N. ^{[1
]}

Nakonechna, O. I. ^{[1
]}

Markiv, V. Ya ^{[1
]}

Babich, M. G. ^{[1
]}

Karbivskii, V. L. ^{[2
]}

机构：

[1] Taras Shevchenko Univ, Dept Phys, 4 Glushkov Ave, UA-03022 Kiev, Ukraine

[2] Natl Acad Sci Ukraine, GV Kurdyumov Inst Met Phys, 36 Vernadsky Blvd, UA-03142 Kiev, Ukraine

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 677卷

关键词：

Intermetallics; Crystal structure; Electronic band structure; Magnetic measurements; X-ray diffraction; X-ray spectroscopy; SYSTEM; PR; ND;

D O I：

10.1016/j.jallcom.2016.03.250

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The DyCuxGa4-x-delta alloys (x = 1.2e0.05) have been studied by the X-ray single-crystal and powder diffraction methods as well as by the magnetometric and XPS techniques. Four individual closely related compounds identified here were shown to be the derivatives of BaAl4-type structure (tetragonal or orthorhombically distorted) with the increased multiplicity of their a and b sublattice constants, namely, I-DyCu1.25-1.12Ga2.67-2.80 (1 x 1), II-DyCu1.07Ga2.74 (3 x 3), III-DyCu0.92-0.76Ga2.84-3.00 (3 x 3) and IV-DyCu0.63-0.06Ga3.00-3.57 (9 x 9). All alloys studied are paramagnets at (300-650) K temperature range. The effective paramagnetic moment per Dy atom was found to exceed the value for the Dy3+ ion (10.65 mu(B)). Besides, it increases up to 11.2 mu(B) with Ga content increasing. Magnetic properties of these alloys are discussed based upon crystal and electronic structure changes. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：178 / 184

页数：7

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